IOCAS-IR  > 海洋环流与波动重点实验室
Salinity effects on the 2014 warm "Blob" in the Northeast Pacific
Zhi, Hai1; Lin, Pengfei2,3; Zhang, Rong-Hua4; Chai, Fei5,6; Liu, Hailong2,3
2019-09-01
Source PublicationACTA OCEANOLOGICA SINICA
ISSN0253-505X
Volume38Issue:9Pages:24-34
Corresponding AuthorLin, Pengfei(Linpf@mail.iap.ac.cn)
AbstractA significant strong, warm "Blob" (a large circular water body with a positive ocean temperature anomaly) appeared in the Northeast Pacific (NEP) in the boreal winter of 2013-2014, which induced many extreme climate events in the US and Canada. In this study, analyses of the temperature and salinity anomaly variations from the Array for Real-time Geostrophic Oceanography (Argo) data provided insights into the formation of the warm "Blob" over the NEP. The early negative salinity anomaly dominantly contributed to the shallower mixed layer depth (MLD) in the NEP during the period of 2012-2013. Then, the shallower mixed layer trapped more heat in the upper water column and resulted in a warmer sea surface temperature (SST), which enhanced the warm "Blob". The salinity variability contributed to approximately 60% of the shallowing MLD related to the warm "Blob". The salinity anomaly in the warm "Blob" region resulted from a combination of both local and nonlocal effects. The freshened water at the surface played a local role in the MLD anomaly. Interestingly, the MLD anomaly was more dependent on the local subsurface salinity anomaly in the 100-150 m depth range in the NEP. The salinity anomaly in the 50-100 m depth range may be linked to the anomaly in the 100-150 m depth range by vertical advection or mixing. The salinity anomaly in the 100-150 m depth range resulted from the eastward transportation of a subducted water mass that was freshened west of the dateline, which played a nonlocal role. The results suggest that the early salinity anomaly in the NEP related to the warm "Blob" may be a precursor signal of interannual and interdecadal variabilities.
Keywordwarm "Blob" mixed layer depth surface and subsurface salinity anomalies
DOI10.1007/s13131-019-1450-2
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program for Developing Basic Sciences[2016YFC1401601] ; National Key Research and Development Program for Developing Basic Sciences[2016YFC1401401] ; National Natural Science Foundation of China[41376026] ; National Natural Science Foundation of China[41690122] ; National Natural Science Foundation of China[41690120] ; National Natural Science Foundation of China[41475101] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406401] ; NSFC Innovative Group Grant[41421005] ; Taishan Scholarship
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000485996200003
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/162972
Collection海洋环流与波动重点实验室
Corresponding AuthorLin, Pengfei
Affiliation1.Nanjing Univ Informat Sci & Technol, Coll Atmospher Sci, Nanjing 210044, Jiangsu, Peoples R China
2.Chinese Acad Sci, IAP, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Shandong, Peoples R China
5.Minist Nat Resources, State Key Lab Satellite Ocean Environm Dynam, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China
6.Univ Maine, Sch Marine Sci, Orono, ME 04469 USA
Recommended Citation
GB/T 7714
Zhi, Hai,Lin, Pengfei,Zhang, Rong-Hua,et al. Salinity effects on the 2014 warm "Blob" in the Northeast Pacific[J]. ACTA OCEANOLOGICA SINICA,2019,38(9):24-34.
APA Zhi, Hai,Lin, Pengfei,Zhang, Rong-Hua,Chai, Fei,&Liu, Hailong.(2019).Salinity effects on the 2014 warm "Blob" in the Northeast Pacific.ACTA OCEANOLOGICA SINICA,38(9),24-34.
MLA Zhi, Hai,et al."Salinity effects on the 2014 warm "Blob" in the Northeast Pacific".ACTA OCEANOLOGICA SINICA 38.9(2019):24-34.
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